TY - JOUR
T1 - Study of energy and performance of space - Time decoding systems in concatenation with turbo decoding
AU - Zhu, Yuming
AU - Li, Laura
AU - Chakrabarti, Chaitali
N1 - Funding Information:
Manuscript received January 1, 2004. This work was supported in part by Arizona State University under Project IT-301 and by the National Science Foundation under ITR 0325761. The authors are with the Department of Electrical Engineering, Arizona State University, Tempe, AZ 85287-7206 USA (e-mail: Yuming.zhu@asu.edu). Digital Object Identifier 10.1109/TVLSI.2005.863185
PY - 2006/1
Y1 - 2006/1
N2 - Recent studies have shown that using space - time code is an effective approach to increase the data rate over wireless channels. Space - time turbo (ST-Turbo) codes formed by concatenating space - time codes with turbo codes, take advantage of both the high diversity order of space - time systems and the randomness of the turbo codes. In this paper, we compare two ST-Turbo codes, i.e., simple space - time turbo codes (SiSTT) and turbo trellis-coded modulation space - time block codes (TTCM-STBCs), and their approximate versions with respect to performance and energy consumption for both general-purpose processor and synthesized implementations. The approximations are aimed at reducing the computational complexity and include reduction in the number of paths, number of iterations, and datapath computations. Analysis of the simulation results show that SiSTT-based versions should be used for higher SNR applications where low energy consumption is the primary design objective, and TTCM-STBC-based versions should be used where performance is the primary design objective. Finally, four ST-Turbo algorithms (i.e., baseline SiSTT and its energy-efficient approximate version and the baseline TTCM-STBC and its energy-efficient approximate version) have been synthesized in 0.18-μm CMOS technology and the implementations compared with respect to area, power, and latency.
AB - Recent studies have shown that using space - time code is an effective approach to increase the data rate over wireless channels. Space - time turbo (ST-Turbo) codes formed by concatenating space - time codes with turbo codes, take advantage of both the high diversity order of space - time systems and the randomness of the turbo codes. In this paper, we compare two ST-Turbo codes, i.e., simple space - time turbo codes (SiSTT) and turbo trellis-coded modulation space - time block codes (TTCM-STBCs), and their approximate versions with respect to performance and energy consumption for both general-purpose processor and synthesized implementations. The approximations are aimed at reducing the computational complexity and include reduction in the number of paths, number of iterations, and datapath computations. Analysis of the simulation results show that SiSTT-based versions should be used for higher SNR applications where low energy consumption is the primary design objective, and TTCM-STBC-based versions should be used where performance is the primary design objective. Finally, four ST-Turbo algorithms (i.e., baseline SiSTT and its energy-efficient approximate version and the baseline TTCM-STBC and its energy-efficient approximate version) have been synthesized in 0.18-μm CMOS technology and the implementations compared with respect to area, power, and latency.
KW - Energy-efficient
KW - Space-time
KW - Turbo code
KW - Very large scale integration (VLSI)
UR - http://www.scopus.com/inward/record.url?scp=33644986009&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33644986009&partnerID=8YFLogxK
U2 - 10.1109/TVLSI.2005.863185
DO - 10.1109/TVLSI.2005.863185
M3 - Article
AN - SCOPUS:33644986009
SN - 1063-8210
VL - 14
SP - 86
EP - 90
JO - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
JF - IEEE Transactions on Very Large Scale Integration (VLSI) Systems
IS - 1
ER -